{"cve":"CVE-2026-4786","nvd":{"published":"2026-04-13T22:16:30.413","modified":"2026-10-26T21:10:00.170","status":"Awaiting Analysis","description":"Mitgation of CVE-2026-4519 was incomplete. If the URL contained \"%action\" the mitigation could be bypassed for certain browser types the \"webbrowser.open()\" API could have commands injected into the underlying shell. See CVE-2026-4519 for details.","cvss_v4":{"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":7.0},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L","score":7.1},"cwes":["CWE-77","CWE-88"],"references":["https://github.com/python/cpython/commit/28b4ad38067bbdad34edfcd03ad2de5f06387e53","https://github.com/python/cpython/commit/a4d3edf3a6ecfde504d02126410d2a65a859b744","https://github.com/python/cpython/commit/c5767a72838a8dda9d6dc5d3558075b055c56bca","https://github.com/python/cpython/commit/d22922c8a7958353689dc4763dd72da2dea03fff","https://github.com/python/cpython/commit/d6d68494be70bdbda20f89f83801ba52ec37daa4"],"products":[],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-4786","score":0.0029,"percentile":0.21374,"date":"2026-10-26"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}